Call Rust code from R 
Installation
To install release version from CRAN, run:
install.packages("rextendr")or use {remotes}
remotes::install_cran("rextendr")You can also install {rextendr} from
r-universe:
install.packages('rextendr', repos = c('https://extendr.r-universe.dev', 'https://cloud.r-project.org'))Latest development version can be installed from GitHub:
remotes::install_github("extendr/rextendr")To execute Rust code, you will also need to set up a working Rust toolchain. See the installation instructions for libR-sys for help. If you can successfully build libR-sys youβre good.
Usage
Basic use example:
library(rextendr)
# create a Rust function
rust_function("fn add(a:f64, b:f64) -> f64 { a + b }")
# call it from R
add(2.5, 4.7)
#> [1] 7.2Something more sophisticated:
library(rextendr)
# Rust function that computes a sum of integer or double vectors, preserving the type
rust_function(
"fn get_sum(x : Either<Integers, Doubles>) -> Either<Rint, Rfloat> {
match x {
Either::Left(x) => Either::Left(x.iter().sum()),
Either::Right(x) => Either::Right(x.iter().sum()),
}
}",
use_dev_extendr = TRUE, # Use development version of extendr from GitHub
features = "either", # Enable support for Either crate
extendr_fn_options = list(use_try_from = TRUE) # Enable advanced type conversion
)
x <- 1:5
y <- c(1, 2, 3, 4, 5)
tibble::tibble(
Name = c("x", "y"),
Data = list(x, y),
Types = purrr::map_chr(Data, typeof),
Sum = purrr::map(Data, get_sum),
SumRaw = purrr::flatten_dbl(Sum),
ResultType = purrr::map_chr(Sum, typeof)
)
#> # A tibble: 2 Γ 6
#> Name Data Types Sum SumRaw ResultType
#> <chr> <list> <chr> <list> <dbl> <chr>
#> 1 x <int [5]> integer <int [1]> 15 integer
#> 2 y <dbl [5]> double <dbl [1]> 15 doubleThe package also enables a new chunk type for knitr, extendr, which
compiles and evaluates Rust code. For example, a code chunk such as this
one:
```{extendr}
rprintln!("Hello from Rust!");
let x = 5;
let y = 7;
let z = x*y;
z
```would create the following output in the knitted document:
rprintln!("Hello from Rust!");
let x = 5;
let y = 7;
let z = x*y;
z
#> Hello from Rust!
#> [1] 35See also
- The cargo-framework and associated R package cargo
- The r-rust organization
Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.